Fix libdl inclusion for default-ub.
Fix libdl inclusion for default-ub.

We shouldn't be using ldlibs for target libraries because it doesn't
add a real dependency.

Change-Id: Ib1ec40b95356feb521e95674b64d04d5ecc06332

xorware/android_build,xorware/android_build,xorware/android_build,xorware/android_build,xorware/android_build